I should concertise you should concertise he should concertise we should concertise you should concertise they should concertise
V-ing form
I should be concertising you should be concertising he should be concertising we should be concertising you should be concertising they should be concertising
Perfect
I should have concertised you should have concertised he should have concertised we should have concertised you should have concertised they should have concertised
V-ing perfect
I should have been concertising you should have been concertising he should have been concertising we should have been concertising you should have been concertising they should have been concertising
Negation
Simple form
I should not concertise you should not concertise he should not concertise we should not concertise you should not concertise they should not concertise
V-ing form
I should not be concertising you should not be concertising he should not be concertising we should not be concertising you should not be concertising they should not be concertising
Perfect
I should not have concertised you should not have concertised he should not have concertised we should not have concertised you should not have concertised they should not have concertised
V-ing perfect
I should not have been concertising you should not have been concertising he should not have been concertising we should not have been concertising you should not have been concertising they should not have been concertising
Interrogative form
Simple form
should I concertise? should you concertise? should he concertise? should we concertise? should you concertise? should they concertise?
V-ing form
should I be concertising? should you be concertising? should he be concertising? should we be concertising? should you be concertising? should they be concertising?
Perfect
should I have concertised? should you have concertised? should he have concertised? should we have concertised? should you have concertised? should they have concertised?
V-ing perfect
should I have been concertising? should you have been concertising? should he have been concertising? should we have been concertising? should you have been concertising? should they have been concertising?
Interro-negative form
Simple form
should I not concertise? should you not concertise? should he not concertise? should we not concertise? should you not concertise? should they not concertise?
V-ing form
should I not be concertising? should you not be concertising? should he not be concertising? should we not be concertising? should you not be concertising? should they not be concertising?
Perfect
should I not have concertised? should you not have concertised? should he not have concertised? should we not have concertised? should you not have concertised? should they not have concertised?
V-ing perfect
should I not have been concertising? should you not have been concertising? should he not have been concertising? should we not have been concertising? should you not have been concertising? should they not have been concertising?